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                        <h1 class="file-heading">File: src&#x2F;pixi&#x2F;loaders&#x2F;SpriteSheetLoader.js</h1>

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&#x2F;**
 * @author Mat Groves http:&#x2F;&#x2F;matgroves.com&#x2F; @Doormat23
 *&#x2F;

&#x2F;**
 * The sprite sheet loader is used to load in JSON sprite sheet data
 * To generate the data you can use http:&#x2F;&#x2F;www.codeandweb.com&#x2F;texturepacker and publish the &quot;JSON&quot; format
 * There is a free version so thats nice, although the paid version is great value for money.
 * It is highly recommended to use Sprite sheets (also know as texture atlas&#x27;) as it means sprite&#x27;s can be batched and drawn together for highly increased rendering speed.
 * Once the data has been loaded the frames are stored in the PIXI texture cache and can be accessed though PIXI.Texture.fromFrameId() and PIXI.Sprite.fromFromeId()
 * This loader will also load the image file that the Spritesheet points to as well as the data.
 * When loaded this class will dispatch a &#x27;loaded&#x27; event
 * @class SpriteSheetLoader
 * @extends EventTarget
 * @constructor
 * @param url {String} the url of the sprite sheet JSON file
 *&#x2F;

PIXI.SpriteSheetLoader = function(url)
{
	&#x2F;*
	 * i use texture packer to load the assets..
	 * http:&#x2F;&#x2F;www.codeandweb.com&#x2F;texturepacker
	 * make sure to set the format as &quot;JSON&quot;
	 *&#x2F;
	PIXI.EventTarget.call( this );
	this.url = url;
	this.baseUrl = url.replace(&#x2F;[^\&#x2F;]*$&#x2F;, &#x27;&#x27;);
	this.texture;
	this.frames = {};
	this.crossorigin = false;
}

&#x2F;&#x2F; constructor
PIXI.SpriteSheetLoader.constructor = PIXI.SpriteSheetLoader;

&#x2F;**
 * This will begin loading the JSON file
 *&#x2F;
PIXI.SpriteSheetLoader.prototype.load = function()
{
	this.ajaxRequest = new AjaxRequest();
	var scope = this;
	this.ajaxRequest.onreadystatechange=function()
	{
		scope.onLoaded();
	}
		
	this.ajaxRequest.open(&quot;GET&quot;, this.url, true)
	if (this.ajaxRequest.overrideMimeType) this.ajaxRequest.overrideMimeType(&quot;application&#x2F;json&quot;);
	this.ajaxRequest.send(null)
}

PIXI.SpriteSheetLoader.prototype.onLoaded = function()
{
	if (this.ajaxRequest.readyState==4)
	{
		 if (this.ajaxRequest.status==200 || window.location.href.indexOf(&quot;http&quot;)==-1)
	 	{
			var jsondata = eval(&quot;(&quot;+this.ajaxRequest.responseText+&quot;)&quot;);
			
			var textureUrl = this.baseUrl + jsondata.meta.image;
			
			this.texture = PIXI.Texture.fromImage(textureUrl, this.crossorigin).baseTexture;
			
		&#x2F;&#x2F;	if(!this.texture)this.texture = new PIXI.Texture(textureUrl);
			
			var frameData = jsondata.frames;
			for (var i in frameData) 
			{
				var rect = frameData[i].frame;
				if (rect)
				{
					PIXI.TextureCache[i] = new PIXI.Texture(this.texture, {x:rect.x, y:rect.y, width:rect.w, height:rect.h});
					
					if(frameData[i].trimmed)
					{
						&#x2F;&#x2F;var realSize = frameData[i].spriteSourceSize;
						PIXI.TextureCache[i].realSize = frameData[i].spriteSourceSize;
						PIXI.TextureCache[i].trim.x = 0&#x2F;&#x2F; (realSize.x &#x2F; rect.w)
						&#x2F;&#x2F; calculate the offset!
					}
	&#x2F;&#x2F;				this.frames[i] = ;
				}
   			}
			
			if(this.texture.hasLoaded)
			{
				this.dispatchEvent( { type: &#x27;loaded&#x27;, content: this } );
			}
			else
			{
				var scope = this;
				&#x2F;&#x2F; wait for the texture to load..
				this.texture.addEventListener(&#x27;loaded&#x27;, function(){
					
					scope.dispatchEvent( { type: &#x27;loaded&#x27;, content: scope } );
					
				});
			}
	 	}
	}
	
}


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